JP2022041270A - Delamination container - Google Patents

Abstract

To provide a square shoulder shaped delamination container in which an inner layer body can be smoothly delaminated from an outer layer body.SOLUTION: A delamination container 1 made of synthetic resin includes: an outer layer body 10 which has a cylindrical mouth part 11 having an outside air introduction hole 15, a shoulder part 12 which is connected to the mouth part 11 and gradually expands downward, a body part 13 which is connected to the shoulder part 12, and a bottom part 14 that closes a lower end of the body part 13; and an inner layer body 20 which is laminated inside the outer layer body 10 and is volume-reduction deformable. The delamination container 1 has such a shape that an R chamfered part 30 provided between the shoulder part 12 and the body part 13 overhangs radially outward from an upper end of the body part 13, wherein a radius of the R chamfered part 30 is 5 mm or more and 10 mm or less.SELECTED DRAWING: Figure 1

Description

The present invention relates to a laminated stripping container made of synthetic resin.

As a synthetic resin container for storing the contents, a tubular mouth part having an outside air introduction hole, a shoulder part connected to the mouth part and gradually increasing in diameter downward, a body part connected to the shoulder part, and a body part. It is provided with an outer layer having a bottom portion that closes the lower end portion, and a volume-reducing deformable inner layer body that is laminated and arranged inside the outer layer body. A laminated peeling container that can inject the contents without replacing the contents with the outside air is known by introducing outside air between the inner layer and maintaining the shape of the outer layer while reducing the volume and deforming only the inner layer. Has been done.

Further, for example, as a laminated peeling container used for storing cosmetics and the like as contents, R provided between the shoulder and the body in order to make the appearance smart and aesthetically pleasing. It is known that the chamfered portion has a so-called shoulder shape in which the chamfered portion protrudes radially outward from the upper end portion of the body portion (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2020-19522

The laminated peeling container is generally formed by blow molding. In this case, after blow molding, the inner layer is separated from the outer layer by sucking out the internal air from the mouth and reducing the pressure, and then the inner layer is filled with air from the mouth to fill the inner layer. By performing the initial peeling treatment to return the body to its original state, the inner layer is smoothly peeled from the outer layer at the time of use, that is, when the contents of the container are poured out from the inner layer.

However, in the above-mentioned conventional laminated peeling container having the shape of an irritated shoulder, the inner layer is difficult to peel from the outer layer at the R chamfered portion, and when the inner layer is peeled from the outer layer, the inner layer may be damaged such as pinholes. There was a problem that there was.

An object of the present invention is to solve such a problem, and an object of the present invention is to provide a laminated peeling container having a shoulder shape, which allows an inner layer body to be smoothly peeled off from an outer layer body. It is in.

The laminated peeling container of the present invention has a tubular mouth portion having an outside air introduction hole, a shoulder portion connected to the mouth portion and gradually increasing in radius downward, a body portion connected to the shoulder portion, and a lower end portion of the body portion. An outer layer having a bottom portion for closing the portion, and a volume-reducing deformable inner layer body laminated and arranged inside the outer layer body are provided, and an R provided between the shoulder portion and the body portion. It is a laminated peeling container made of synthetic resin having a chamfered portion protruding radially outward from the upper end portion of the body portion, and is characterized in that the radius of the R chamfered portion is 5 mm or more and 10 mm or less. do.

In the above-mentioned configuration, in the laminated peeling container of the present invention, the body portion is gradually reduced in diameter from the upper end portion connected to the R chamfered portion downward, and the lower end portion connected to the bottom portion from the smallest diameter portion having the smallest diameter. It is preferable that the shape is a constriction whose diameter is gradually increased toward.

In the above configuration, the laminated peeling container of the present invention has a tangent line of the shoulder portion at the boundary portion between the shoulder portion and the R chamfered portion and a tangent line of the body portion at the boundary portion between the body portion and the R chamfered portion. It is preferable that the angle α formed by the above is 100 ° or more and 150 ° or less.

In the above-mentioned configuration, the laminated peeling container of the present invention preferably has the angle α of 110 ° or more and 130 ° or less.

In the above-mentioned configuration, the laminated peeling container of the present invention preferably has an adhesive band extending along the axial direction between the outer layer body and the inner layer body.

According to the present invention, it is possible to provide a laminated peeling container having a shoulder shape, which allows the inner layer body to be smoothly peeled off from the outer layer body.

It is a partially cutout front view of the laminated peeling container which concerns on one Embodiment of this invention. It is a side view of the laminated peeling container shown in FIG. It is a top view of the laminated peeling container shown in FIG. It is an enlarged view which shows the main part of the laminated peeling container shown in FIG. 1 in an enlarged manner. It is a partially cutout front view of the modification of the laminated peeling container shown in FIG. 1.

Hereinafter, the laminated stripping container 1 according to the embodiment of the present invention will be described in detail with reference to the drawings.

In the present specification and claims, "upper" means the upper side in a state where the laminated peeling container 1 is arranged in the upright posture shown in FIG. 1, and "lower" means the opposite side. The radial direction is defined as the direction perpendicular to the axis O of the laminated peeling container 1.

The laminated peeling container 1 shown in FIGS. 1, 2 and 3 is used for storing, for example, a liquid such as cosmetics, and is laminated on the outer layer 10 constituting the outer shell and the inside of the outer layer 10. It is provided with an arranged inner layer body 20 that can be reduced in volume and deformable. The content storage space S is provided inside the inner layer 20.

The laminated stripping container 1 is made of synthetic resin. For example, a cylindrical laminated parison is formed by co-extruding a synthetic resin forming an outer layer 10 and a synthetic resin forming an inner layer 20 in a molten state. It can be formed by sandwiching a laminated parison between dies and performing blow molding (extrusion blow molding).

In the present embodiment, the outer layer body 10 is made of polyethylene (PE), polypropylene (PP), or the like. The inner layer 20 may have a laminated structure composed of an ethylene vinyl alcohol copolymer resin (EVOH) constituting the outer layer, a modified polyolefin resin constituting the adhesive layer, and polyethylene constituting the inner layer from the outside, and is used for each layer. The material can be appropriately selected. Further, the outer layer body 10 and the inner layer body 20 may have a single layer or a laminated structure, respectively.

As shown in FIG. 2, the laminated stripping container 1 extends vertically along the direction of the axis O between the outer layer body 10 and the inner layer body 20, and the inner layer body 20 partially extends with respect to the outer layer body 10. It is also possible to have a configuration provided with a plurality of adhesive bands (adhesive layers) 2) to be adhered. In the present embodiment, two adhesive bands 2 are provided side by side on both sides of the axis O from the mouth portion 11 to the bottom portion 14 so as to sandwich the parting line PL formed at the time of blow molding. The number of adhesive bands 2 can be changed in various ways. Further, the laminated peeling container 1 may be configured such that a barrier layer having a barrier property against oxygen or water vapor is laminated and arranged, or a structure in which the barrier property is enhanced by various coatings.

The outer layer body 10 has a tubular mouth portion 11, a shoulder portion 12 connected below the mouth portion 11, a body portion 13 connected below the shoulder portion 12, and a bottom portion 14 that closes the lower end portion of the body portion 13. I have.

The mouth portion 11 has a cylindrical shape centered on the axis O, and has an annular step portion 11a connected to the upper end of the shoulder portion 12, a cylindrical portion 11b having a smaller diameter than the annular step portion 11a, and a cylindrical portion 11b. It is provided with a small-diameter mouth portion 11c.

On the outer peripheral surface of the cylindrical portion 11b, a male screw portion 11d for attaching a cap or the like to the laminated peeling container 1 is integrally formed. In addition, instead of the male screw portion 11d, a convex or concave engaged portion is provided, and the concave or convex engaging portion provided on the cap engages with the engaged portion to engage the cap. May be held in the mouth 11.

The cylindrical portion 11b is provided with outside air introduction holes 15 at two locations facing each other with the axis O interposed therebetween. The outside air introduction hole 15 is configured as a through hole having a circular cross section that penetrates the outer layer body 10 in the radial direction. The outside air introduction hole 15 does not penetrate the inner layer body 20, and outside air can be introduced between the outer layer body 10 and the inner layer body 20 through the outside air introduction hole 15. The outside air introduction hole 15 may be provided in the mouth portion 11, and the number and position thereof are not limited to the illustrated examples.

The shoulder portion 12 is integrally connected to the lower end portion of the mouth portion 11, that is, the lower end portion of the annular step portion 11a in the present embodiment, and the diameter is gradually increased downward. In the present embodiment, the shoulder portion 12 has a truncated cone shape in which the entire shoulder portion 12 is inclined at a substantially constant angle with respect to the axis O and the contour line is a straight line, but the present invention is not limited to this, and the shoulder portion 12 is on the outside of the container. It may have a dome shape that bulges toward the inside, or conversely, it may have an inverted dome shape that becomes concave toward the inside of the container. In the present embodiment, the shoulder portion 12 has a shape in which the cross section (cross section) perpendicular to the axis O is circular, but the shape is not limited to this, and the cross section is oval or polygonal. But it may be.

An R chamfered portion 30 is provided between the shoulder portion 12 and the body portion 13, and the upper end portion of the body portion 13 is integrated with the lower end portion (outer peripheral edge portion) of the shoulder portion 12 via the R chamfered portion 30. It is connected. In front view, the R chamfered portion 30 is curved so as to have an R chamfered shape between the shoulder portion 12 and the body portion 13, and extends in an annular shape between the shoulder portion 12 and the body portion 13 about the axis O. It is a curved surface.

On the other hand, the lower end portion of the body portion 13 is integrally connected to the outer peripheral edge portion of the bottom portion 14. The body portion 13 has flexibility that allows squeeze, and the laminated peeling container 1 is configured so that the contents can be poured out by the squeeze of the body portion 13.

In the present embodiment, the body portion 13 is entirely curved so that the intermediate portion in the height direction (axial direction) is concave toward the axis O side. That is, the body portion 13 has a constricted shape in which the diameter is gradually reduced downward from the upper end portion connected to the R chamfered portion 30 and gradually expanded from the smallest diameter portion having the smallest diameter toward the lower end portion connected to the bottom portion 14. It has become.

In the present embodiment, the body portion 13 has a substantially cylindrical shape having a circular cross section (cross section) perpendicular to the axis O, but is not limited to this, and has a shape such that the cross section has an elliptical shape or a polygonal shape. But it may be.

The bottom portion 14 has a disk shape with the central portion curved toward the inside of the container, and the laminated peeling container 1 can stand on its own by grounding the bottom surface of the bottom portion 14. A pinch-off portion 14a is formed on the bottom portion 14 by cutting off with a blow molding split die.

The laminated peeling container 1 has a shape in which the R chamfered portion 30 projects radially outward from the upper end portion of the body portion 13, that is, a so-called shoulder shape when viewed from the front. The laminated peeling container 1 has the shape of a shoulder, so that the appearance is smart and the appearance is high.

As shown in FIG. 4, in the laminated peeling container 1, the radius R of the R chamfered portion 30 is 5 mm or more and 10 mm or less. In the present embodiment, the radius R of the R chamfered portion 30 is 5 mm. The radius R of the R chamfered portion 30 is the radius on the outer surface of the R chamfered portion 30 in front view.

When the laminated peeling container 1 has the shape of an irritated shoulder in which the R chamfered portion 30 projects radially outward from the upper end portion of the body portion 13, when the radius R of the R chamfered portion 30 is made larger than 10 mm, the laminated peeling is performed. The smart impression of the appearance of the container 1 is diminished and the aesthetic appearance is deteriorated.

On the other hand, in the laminated peeling container 1, since the radius R of the R chamfered portion 30 is 10 mm or less, the appearance of the laminated peeling container 1 can be made smart and aesthetically pleasing.

On the other hand, when the radius R of the R chamfered portion 30 is made smaller than 5 mm, the inner layer body 20 becomes difficult to peel off from the outer layer body 10 in the R chamfered portion 30, and the inner layer body 20 becomes the outer layer body in the initial peeling treatment (preliminary peeling treatment) or the like. When peeling from 10, there is a possibility that the inner layer 20 may be damaged such as a pinhole.

On the other hand, in the laminated peeling container 1, since the radius R of the R chamfered portion 30 is 5 mm or more, the peelability of the inner layer 20 in the R chamfered portion 30 from the outer layer 10 is improved, and the inner layer 20 is pinholeed. It is possible to prevent damage such as.

As described above, in the laminated peeling container 1 of the present embodiment, the radius R of the R chamfered portion 30 provided between the shoulder portion 12 and the body portion 13 is set to 5 mm or more and 10 mm or less. The appearance of the peeling container 1 can be made smart and aesthetically pleasing, and can be made to have the shape of a chamfered shoulder, while preventing damage such as pinholes from occurring in the inner layer body 20.

Further, in the laminated peeling container 1 of the present embodiment, the body portion 13 is gradually reduced in diameter from the upper end portion connected to the R chamfered portion 30 downward, and the lower end portion connected to the bottom portion 14 from the smallest diameter portion having the smallest diameter. Since the diameter of the laminated peeling container 1 is gradually expanded toward the portion, the laminated peeling container 1 has a smarter and more aesthetically pleasing shape, while preventing damage such as pinholes in the inner layer 20. Can be.

Further, in the laminated stripping container 1 of the present embodiment, since the adhesive band 2 is provided between the outer layer body 10 and the inner layer body 20 along the axis O, the outer layer body of the inner layer body 20 accompanying the pouring of the contents is provided. It is possible to control the peeling from the 10 and reduce the remaining amount of the contents remaining in the storage space S. Further, when the adhesive band 2 is provided between the outer layer 10 and the inner layer 20 along the axis O, the inner layer 20 is peeled from the outer layer 10 in the initial peeling process. Peeling may stop at the portion of the adhesive band 2, and the inner layer 20 may be torn at the stop portion (the portion adjacent to the adhesive band 2). However, in the laminated peeling container 1 of the present embodiment, the shoulder portion 12 Since the radius R of the R chamfered portion 30 provided between the body portion 13 and the body portion 13 is 5 mm or more and 10 mm or less, even in the configuration in which the adhesive band 2 is provided, the inner layer body 20 is damaged such as pinholes. Can be prevented.

As shown in FIG. 4, in the laminated peeling container 1, the tangent line of the shoulder portion 12 at the boundary portion between the shoulder portion 12 and the R chamfered portion 30 and the body portion 13 at the boundary portion between the body portion 13 and the R chamfered portion 30 The angle α formed by the tangent line is preferably 100 ° or more and 150 ° or less. In this embodiment, the angle α is 117.225 °. As a result, it is possible to prevent the inner layer 20 from being damaged such as pinholes while making the laminated peeling container 1 more aesthetically pleasing with a smarter shoulder shape.

Further, the angle α formed by the tangent line of the shoulder portion 12 at the boundary portion between the shoulder portion 12 and the R chamfered portion 30 and the tangent line of the body portion 13 at the boundary portion between the body portion 13 and the R chamfered portion 30 is 110 ° or more. , 130 ° or less is more preferable. By setting the angle α to 110 ° or more and 130 ° or less, it is possible to prevent damage such as pinholes from occurring in the inner layer 20 while making the shape of the shoulders smarter and more aesthetically pleasing. Can be.

It goes without saying that the present invention is not limited to the above-described embodiment and can be variously modified without departing from the gist thereof.

For example, in the laminated peeling container 1 shown in FIG. 1, the radius R of the R chamfered portion 30 is 5 mm, but the radius R of the R chamfered portion 30 may be 5 mm or more and 10 mm or less. As shown as an example, the radius R of the R chamfered portion 30 may be 10 mm. Also in this modification, the appearance of the laminated peeling container 1 is made into a smart and aesthetically pleasing shape of a pinhole shoulder, while the peelability of the inner layer 20 in the R chamfered portion 30 from the outer layer 10 is enhanced to improve the peelability of the inner layer 20 from the outer layer 10. It is possible to prevent damage such as pinholes from occurring.

Further, the laminated peeling container 1 is not limited to the one formed by extrusion blow molding, but may be formed by biaxial stretching blow molding using a preform or the like.

Further, the shapes of the mouth portion 11, the shoulder portion 12, the body portion 13, and the bottom portion 14 can be appropriately changed, and for example, concave portions or convex portions may be provided on the surfaces of the shoulder portion 12 and the body portion 13.

1 Laminated peeling container 2 Adhesive band 10 Outer layer 11 Mouth 11a Circular step 11b Cylindrical part 11c Mouth 11d Male thread 12 Shoulder 13 Body 14 Bottom 14a Pinch-off hole 15 Outside air introduction hole 20 Inner layer 30 R Chamfer O axis S Storage space PL parting line

Claims (5)

A tubular mouth portion having an outside air introduction hole, a shoulder portion connected to the mouth portion and gradually expanding in diameter downward, a body portion connected to the shoulder portion, and a bottom portion closing the lower end portion of the body portion. With the outer layer that has
A volume-reducing deformable inner layer, which is laminated and arranged inside the outer layer, is provided.
A synthetic resin laminated peeling container in which the R chamfered portion provided between the shoulder portion and the body portion projects radially outward from the upper end portion of the body portion.
A laminated peeling container characterized in that the radius of the R chamfered portion is 5 mm or more and 10 mm or less. The body portion has a constricted shape in which the diameter is gradually reduced downward from the upper end portion connected to the R chamfered portion and gradually expanded from the smallest diameter portion having the smallest diameter toward the lower end portion connected to the bottom portion. , The laminated peeling container according to claim 1. The angle α formed by the tangent line of the shoulder portion at the boundary portion between the shoulder portion and the R chamfered portion and the tangent line of the body portion at the boundary portion between the body portion and the R chamfered portion is 150 ° or more. The laminated stripping container according to claim 1 or 2, which is not less than or equal to °. The laminated stripping container according to claim 3, wherein the angle α is 110 ° or more and 130 ° or less. The laminated stripping container according to any one of claims 1 to 4, wherein an adhesive band extending along the axial direction is provided between the outer layer body and the inner layer body.

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